With that i mean... what players were the best at getting into peoples heads?

Ill start of by giving one candidate... Reggie Miller, he even called it "psychological warfare", what he did with Jordan, Knicks (and many others) in that aspect is the stuff of legend haha

Larry Bird i remember loved to troll his opponents aswell, many great stories there i will share with you if you want... Obviously Kevin Garnett deserves a mention especially with his latest victim? :)